public class SwittchDemo {
    public static void main(String[] args) {
        int i;
        i=3;
        switch(i){

            case 2:
                System.out.println("2");
                break;
            case 3:
                System.out.println("3");
            case 4:
                System.out.println("4");
            default:
                System.out.println("我在Default中");
//            break;
        }
    }

}
